NTUD3128NT5G MOSFET Equivalent & Substitute Parts

Part Overview

The NTUD3128NT5G is a dual N-channel MOSFET array manufactured by onsemi, designed for surface mount applications in SOT-963 packaging. This device features logic level gate operation with a maximum drain-source voltage of 20V and continuous drain current rating of 160mA at 25°C. The component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while preserving the same physical package footprint.

Substiute Parts

NTUD3128NT5G

onsemiIn Stock: 89876NTUD3128NT5G Datasheet

Current PartRFQ

NTUD3170NZT5G

onsemiIn Stock: 35253NTUD3170NZT5G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NTUD3128NT5G is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Drain to Source Voltage (Vdss): Must equal or exceed 20V
• Configuration: Must be 2 N-Channel (Dual) topology
• Package / Case: Must be SOT-963 surface mount
• Operating Temperature Range: Must span -55°C to 150°C (TJ)
• Mounting Type: Must be Surface Mount
• FET Feature: Must support Logic Level Gate operation

Performance Parameters:

• Current - Continuous Drain (Id): Substitute must meet or exceed 160mA at 25°C
• Rds On (Max): Substitute must not exceed 3Ohm @ 100mA, 4.5V
• Vgs(th) (Max): Must not exceed 1V @ 250µA
• Power - Max: Must equal or exceed 125mW
• Input Capacitance (Ciss): Must not exceed 9pF @ 15V

The NTUD3170NZT5G qualifies as a direct substitute based on matching all critical parameters while providing enhanced performance in current handling and on-resistance characteristics.

Parameter Comparison

Engineering Selection Recommendations

NTUD3170NZT5G as Primary Substitute:

The NTUD3170NZT5G is the qualified substitute for the obsolete NTUD3128NT5G. This substitution is supported by the following factors:

1. Product Status Alignment: The NTUD3170NZT5G maintains Active product status, ensuring continued availability and manufacturing support from onsemi, whereas the NTUD3128NT5G is classified as Obsolete.

2. Electrical Compatibility: The substitute part maintains identical Vdss (20V), Vgs(th) (1V @ 250µA), and operating temperature range (-55°C to 150°C TJ). The substitute provides superior performance with increased continuous drain current (220mA versus 160mA) and reduced on-resistance (1.5Ohm versus 3Ohm @ 100mA, 4.5V).

3. Package and Mounting Equivalence: Both devices utilize SOT-963 surface mount packaging with identical physical footprints, enabling direct PCB layout compatibility without redesign.

4. Compliance and Certifications: The NTUD3170NZT5G carries RoHS3 compliance certification and maintains REACH Unaffected status, consistent with the main part's regulatory classification.

5. Moisture Sensitivity: Both parts share MSL 1 (Unlimited) rating, indicating equivalent handling and storage requirements.

The enhanced current and reduced on-resistance of the NTUD3170NZT5G provide design margin improvements while maintaining full backward compatibility with existing circuit implementations.

Frequently Asked Questions (FAQ)

Q: Can the NTUD3170NZT5G directly replace the NTUD3128NT5G in existing designs?

A: Yes. The NTUD3170NZT5G is a direct substitute with identical package footprint (SOT-963), voltage rating (20V Vdss), gate threshold voltage (1V @ 250µA), and operating temperature range (-55°C to 150°C TJ). No PCB layout modifications are required.

Q: What are the key performance differences between these parts?

A: The NTUD3170NZT5G provides higher continuous drain current (220mA versus 160mA) and lower on-resistance (1.5Ohm versus 3Ohm @ 100mA, 4.5V). Both maintain identical maximum power dissipation (125mW) and voltage specifications.

Q: Why is the NTUD3128NT5G classified as Obsolete?

A: The NTUD3128NT5G is listed as Obsolete by onsemi. The NTUD3170NZT5G represents the active product line continuation with enhanced electrical performance characteristics.

Q: Are there any thermal or reliability differences between these MOSFETs?

A: Both devices share identical operating temperature range (-55°C to 150°C TJ) and maximum power rating (125mW). The NTUD3170NZT5G's lower on-resistance may result in reduced junction temperature under equivalent load conditions.

Q: What is the significance of the SOT-963 package for these dual N-channel MOSFETs?

A: SOT-963 is a miniature surface mount package designed for dual MOSFET arrays. This package enables compact integration of two independent N-channel transistors in applications requiring small form factor and high-density PCB layouts.

Q: Do both parts require identical PCB layout considerations?

A: Yes. Both the NTUD3128NT5G and NTUD3170NZT5G utilize SOT-963 packaging with identical pin configurations and physical dimensions. Existing PCB designs require no modification for substitution.

Q: What is the Moisture Sensitivity Level (MSL) rating for these parts?

A: Both devices carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. These parts do not require special moisture control during storage or handling.

Q: Are there compliance or regulatory differences between these parts?

A: The NTUD3170NZT5G carries RoHS3 compliance certification. Both parts maintain REACH Unaffected status and identical ECCN (EAR99) and HTSUS (8541.21.0095) classifications.